1.

for an isomerisation reaction A LeftrightarrowB , the temperature dependence of equilibrium constant is given by log_(e)K =4.0 -2000/T .the value of DeltaS^(@)at 300 K is therefore,

Answer»

4R
5 R
400 R
2000 R

Solution :variation of K with temperature is GIVEN by `log K =(DeltaS^(@))/R- (DeltaH^(@))/(RT)=4.0-2000/T`
on COMPARING `(DeltaS^(@))/R=4or DeltaS^(@)=4R`


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